| 波纹表面结霜的实验研究 |
| |
| 引用本文： | 马强,吴晓敏,朱贝. 波纹表面结霜的实验研究[J]. 化工学报, 2017, 68(Z1): 191-195. DOI: 10.11949/j.issn.0438-1157.20170630 |
| |
| 作者姓名： | 马强 吴晓敏 朱贝 |
| |
| 作者单位： | 清华大学热能工程系, 热科学与动力工程教育部重点实验室, 北京市CO2资源利用与减排技术重点实验室, 北京 100084 |
| |
| 基金项目： | 教育部高等学校博士学科点专项科研基金项目（20130002110073）；清华大学自主科研计划项目（20131089319）。 |
| |
| 摘 要： | 结霜工况下，换热器翅片表面结霜会增大换热热阻，堵塞空气流道。在低温高湿条件下对波纹表面的结霜过程进行了实验研究，分析了冷面温度、湿空气流速及波纹结构等因素对波纹表面冷凝水珠冻结和霜层生长的影响。结果表明：冷面温度越低，冻结的冷凝水珠越小，冻结时间也越短；冷面温度越低或湿空气流速越快，霜层生长越快；在相同的实验条件下，波纹表面上霜层的高度比平直表面的低。
|
| 关 键 词： | 相变 表面 传热 结霜 水珠冻结 霜层高度 |
| 收稿时间： | 2017-05-16 |
| 修稿时间： | 2017-05-23 |
Experimental study of frosting on wavy plate |
| |
| MA Qiang,WU Xiaomin,ZHU Bei. Experimental study of frosting on wavy plate[J]. Journal of Chemical Industry and Engineering(China), 2017, 68(Z1): 191-195. DOI: 10.11949/j.issn.0438-1157.20170630 |
| |
| Authors: | MA Qiang WU Xiaomin ZHU Bei |
| |
| Affiliation: | Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Key Laboratory of CO2 Utilization and Reduction Technology, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China |
| |
| Abstract: | For heat exchangers operating with low air temperature and high humidity,frost appears on the fin surfaces,which increases the thermal resistance and blocks the air channels. Frosting process on a wavy plate was experimentally investigated. This study focuses on several factors affecting the condensate water droplets freezing process and frost layer growth process,i.e. the cooling surface temperature,the air velocity and the plate structure. The results show that the condensate droplets are smaller and freeze earlier with lower cooling surface temperature. The frost layer grows faster with lower cooling surface temperature and higher air velocity. Compared with flat plates,frost height growth on wavy plates is much slower. |
| |
| Keywords: | phase change surface heat transfer frosting water droplet freezing frost height |
|
| 点击此处可从《化工学报》浏览原始摘要信息 |
|
点击此处可从《化工学报》下载免费的PDF全文 |
